semiminor_axis has definitions from the field of geometry
[ noun ] (geometry) one-half the minor axis of an ellipse

Used in print

(J. F. Vedder, "Micrometeorites", in Francis S. J...)

The Poynting-Robertson effect causes the semi major_axis of orbits to diminish more rapidly than the semi-minor_axis , with a consequent tendency toward circular orbits as the particles move toward the sun .

Related terms

axis minor_axis